Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
There are no annotations, so the description carries the burden of explaining behavior. It does describe the output content well and implies this is a read-only introspection tool, but it does not explicitly state side-effect-free behavior, authentication needs, or response shape. For a simple field-list tool this is adequate but not richly transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.